<template>
<div class="login_container">
<div class="login_box">
	<!-- 头像区域 -->
	<div class="avatar_box">
		<img src="../assets/logo.png" alt="">
	</div>
	<!-- 登录表单区域 -->
	<el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
		<!-- 用户名 -->
	  <el-form-item prop="username">
	    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
	  </el-form-item>
	  <!-- 密码 -->
	  <el-form-item prop="password">
	    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
	  </el-form-item>
	  <!-- 按钮区域 -->
	  <el-form-item class="btns">
	   <el-button type="primary" @click="login">登录</el-button>
	   <el-button type="info" @click="resetLoginForm">重置</el-button>
	  </el-form-item>
	</el-form>
</div>
</div>
</template>

<script>
export default {
	data(){
		return {
			// 这是登录表单的数据绑定对象
			loginForm: {
				username: 'admin',
				password: '123456'
			},
			// 这是表单的验证规则对象
			loginFormRules: {
				// 验证用户名是否合法
				username: [
					{ required: true, message: '请输入用户名称', trigger: 'blur' },
					{ min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
				],
				// 验证密码是否合法
				password: [
					{ required: true, message: '请输入登录密码', trigger: 'blur' },
					{ min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
				]
			}
		};
	},
	methods: {
		// 点击重置按钮，重置登录表单
		resetLoginForm() {
			// console.log(this);
			this.$refs.loginFormRef.resetFields();
		},
		login() {
			this.$refs.loginFormRef.validate(async valid => {
				// console.log(valid);
				if (!valid) return;
				const {data: res } = await this.$http.post('login', this.loginForm);
				console.log(res);
				if (res.meta.status !== 200) {
					return this.$message.error('登录失败');//console.log('登录失败'); $message里面的错误弹框
				} else {
					//console.log('登录成功');
					this.$message.success('登录成功');
				}
				// 1.将登录成功之后的token, 保存到客户端的sessionStorage 中
				// 1.1项目中出了登录之外的其他API接口，必须在登录之后才能访问
				// 1.2 token只应在当前网站J开期间生效，所以将token 保存在sessionStorage
				window.sessionStorage.setItem('token',res.data.token);
				// 2.通过编程式导航跳转到后台主页，路由地址是/home
				this.$router.push('/home');		
			})
			
		}
	}
};
</script>

<style lang="less" scoped>
.login_container {
	background-color: #2b4b6b;
	height: 100%;
}
.login_box{
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 450px;
	height: 300px;
	background-color: #fff;
	border-radius: 3px;
	
	.avatar_box{
		position: absolute;
		left: 50%;
		transform: translate(-50%, -50%);
		height: 130px;
		width: 130px;
		border: 1px solid #eee;
		border-radius: 50%;
		padding: 10px;
		box-shadow: 0 0 10px #ddd;
		background-color: #fff;
		img{
			width: 100%;
			height: 100%;			
			border-radius: 50%;
			background-color: #eee;
		}
	}
}
.btns{
	display: flex;
	justify-content: flex-end;
}

.login_form{
	position: absolute;
	bottom: 0;
	width: 100%;
	padding: 0 20px;
	box-sizing: border-box;
}
</style>
